Optimizes fuel combustion efficiency to save fuel consumption. For Golf ,Material:Plastic + Metal,Porous fuel injectors allow quick starts in cold environments. Reduced flow fluctuations for precise fuel control. Package Contents:4 x Injector nozzle ,Smaller fuel particles to reduce engine fuel consumption. Added fuel filtration protection to remove and optimize engine . The biggest advantage of jet fuel delivery is that the fuel delivery control is very precise, so that the engine has the right air-fuel ratio in all working conditions. Effectively reduces engine exhaust emissions., Manufacturer: NMJLQW